Take-up mechanism for looms.



PATBNTED DEG. 27, 1904.

l W. S. SOUTHWIGK. y TAKE-UP MEGHANISM FOR LOOMS.

' APPLICATION FILED SEPT.26.1904.

2 SHEETS-SHEET 1.

No. 778,612. PATBNTED DEG. 27, 1904.

W. S. SOUTHWICK. TAKE-UP MEGHANISM FOR LOOMS.

APPLICATION FILED SEPT.26. 1994.

UNTTED STATES Patented December 27', 1904 PATENT OEETCE.

WILLIAM S. SOUTHIVICK, OF HOPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPERCOMPANY, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

TAKE-UP IVIECHANISIVI FOR LOONIS..

SPECFICATION forming part of Letters Patent No. 778,612, dated December27, 1904. Application led September 26, 1904. Serial No. 226,085.

To all whom it may con/cern:

Be it known that I, WILLIAM S. SoUTI-IwIoK, a citizen of the UnitedStates, and a resident of Hopedale, county of IVorcester, State ofMassachusetts, have invented an Improvement in Take-Up Mechanism forLooms, of which the following description, in connection with theaccompanying drawings, is a specification, like characters on thedrawings representing IO like parts.

This invention relates more particularly to the so-called positive typeof take-up mechanism, comprehending a continuously-rotated drivingmember and transmitting devices, in-

cluding a worm and worm-gear between the driving member and the take-upor sand roll, as opposed to the well-known pawl-and-ratchet type oftake-up.

In United States Patent No. 648,903 a takeup mechanism of the positivetype is shown,

and novel means are provided therein to arrest take-up during the slightinterval occupied by change of filling in an automaticlilling-replenishing loom and to prevent take-up z 5 whentheloomisstopped automatically. Such apparatus is generally eiiicient inactual practice, but is open to the objection that at times some of theparts which govern the arrest of the take-up operate tardily or stick,so that the desired retardation or stoppage in the taking up of thecloth is not effected. This results in a fault in the cloth; and mypresent invention has for its object the production of means topositively insure not only the opera- 3 5 tion of the take-up-arrestingdevices, but also to cause a certain amount of let-back, my inventionbeing' illustrated in connection with take-up mechanism which forms thesubjectmatter of the patent referred to.

40 Figure 1 is a left-hand side elevation, partly broken out, of aportion of a loom provided with automatic filling-replenishing mechanismwith one embodiment of my present invention operatively applied to thetake-up mechanism. Fig. 2 is a front elevation of the take-up mechanismshown in Fig. 1. Fig. 3 is adetail in inner side elevation of a portionof the take-up-arresting means and the device for insuring the positiveoperation thereof and the letting back of the cloth, the parts being innormal position and the lay forward. Fig. 4 is a similar view, butshowing the arresting means as just about to be operated by or throughthe action of my present invention; and Fig. 5 is an enlarged detail,partly 55 in section, on the line 5 5, Fig. 3, looking toward the left.

Referring to Fig. l, the cam-shaft C, fillingfork F, and its slidef,movable in a guide attached to the breast-beam A4", the automatic 60fillingreplenishing mechanism, (only the feeder or hopper H beingshown,) and the controlling rock-shaft d are of well-known constructionand operate in usual manner. The slide f when moved outward upondetection of filling failure by the fork F engages the arm di, fast onthe rock-shaft CZ', to turn the latter and effect filling replenishmentwith or without stoppage of the loom, both operations being well known.

The take-up roll T, attached gear T/, meshing with gear T2, driven by alpinion 258, rotatable with a large gear T3, the pinion t, meshing withsaid large gear and rotatable with another large gear T4, which mesheswith the driven member of the take-up mechanism, are of Vcommonconstruction.

Through bevel-g'ears c c and a shaft c2, having at its front end a wormc3, the cam-shaft C rotates a worm-gear c", which is connected 8O by asuitable coupling' C with a shaft D, the parts just referred tocorresponding to the structure in Patent N o. 648,903, and the drivingmember of the take-up mechanism consists of the two separated disks D"D10, secured to the shaft and provided on their opposed inner faces withseries of teeth (29,6210, respectively. (See Fig. 2.) The teeth CZ 1 areshown as much more widely separated than are the teeth d, the differencebetween the number of teeth in the two series determining the amount oflet-back and the duration of the arrest period of the take-up mechanism,as will be explained hereinafter. VAs in the patent referred to, thedriving member is continuously rotated so long as the loom is running,and the driven member is the long shiftable pinion E, loosely mounted onshaft D between the disks, flanges eX on the ends of the pinion havingon their outer faces teeth e9 el, which IOO correspond to the series ofteeth Z9 Zw, re spectively. Normally the pinion is 1n the position shownin Fig. 2 and the disk Dw actuates the take-up mechanism, a yoke fw,fuli crumed at f31 on the stand Fw, cooperating with the iianges @X andcontrolling the position of the pinion, the yoke having pivotallyconnected to it at 7632 a link fw, the upper end of the link beingpivotally connected with an arm f3", fast on the rock-shaft Z C i/Vhenthe parts are in the position shown in Fig. 2, the points of the teethZ9 @9 are opposite each other and the space between them is suiiicientto permit complete disengagement of teeth ew from the teeth w before theteeth Zg e engage. Upon rocking of shaft Z when filling failure isdetected the link f 33 throws the yoke fw to the left, Fig. 2, and thedriven member E will be disengaged from the disk Dw and shifted overinto engagement with disk D9. As soon, however, as the teeth ew arecleared the disks move forward in the direction of arrow 25, Fig. 2,bringing the spaces between the teeth 'Z opposite the points of theteethr e9, so that the two sets of teeth mesh, the ro tation of thedriven member E having stopped when the teeth ew were disengaged fromthe teeth Z w. The advance of the disks when the driven member is inmid-position imparts a slight gain to the driving member (whichcomprises the disks) and the ends of the teeth cw are brought oppositethe ends of the teeth Zw. When the shaft Z returns to normal positionafter the operation of the filling-replenishing mechanism, the member Eis shifted to the right, clearing the teeth @9, and as they move awayfrom the teeth Z J the driving member increases its gain over the drivenmember sufficiently to cause the ends of the teeth ew to pass behind theteeth Zw previously engaged. There is then lost motion of the drivenmember, while the space between the teeth Zw 1w is taken up by theforward movement of the disks. Such lost motion and the correspondingstoppage of the driven member of course causes arrest of the take-upupon the operation of the controlling rock-shaft Z the duration ofarrest depending upon the space between the driving-faces of the teethZw.

VV'th the exception of the changes in the construction and arrangementof the teeth the mechanism just described does not differ' materiallyfrom that shown in the patent previously referred to, except that l havevery greatly increased the duration of the period in which take-up isarrested. In said patent the stoppage of the driven member depends uponthe pull of the cloth and the friction of the various moving parts ofthe mechanism; but if such resistance is insuflicient and the toothedportions of the driving and driven members become clogged or stick theproper arrest of take-up will not be effected. To obviate such resultand insure proper arrest, as weil as cause definite let-back, I haveherein provided means to positiveiy eifect retrograde rotation of thedriven member when it is released frein control of the driving member,the extent of retrograde movement being determined by the spacing of theteeth Z w.

The lower end of the link f33 has a rearward extension 1, (see Figs. 3and 4,) on which is bolted the shank 2 of an upturned bifurcated guide3, in which is supported a pawlcarrier 4 below the large gear Tl andhaving an upturned pawl or tooth 5 adapted to at times engage said gear.The pawl-carrier has an elongated straight shank 6, which is slidablyextended through a bearing ZX on the lay-sword A adjacent the take-upmechanism, an upturned toe 7 on the pawl-carrier bearing against thefront of the bearing, so that the tension of the spring 8X (surroundingthe shank between the back of the bearing1 and a collar 8) tends tonormally depress 'the pawl-carrier and maintain the pawl out ofengagement with the gear Tt As the lay swings back and forth thepawl-carrier slides in the guide, but without any engagement of the pawl5 with the teeth of said gear, as shown in Fig. 8, the lay being onfront center. When, however, the rock-shaft Z is turned to lift the linkf3@ and shift the driven member E to the left, Fig. 2, the guide 3 israised, bringing the pawl 5 into engagement with the gear T* in theposition shown in 4 when the lay is fully forward. As the lay goes backthe rock-shaft Z returns to normal position, lowering the link andshifting the member E to the right, and until the said driven member isdisengaged from the disk D the spring 8X is compressed. Zhen the drivenmember is cleared, however, the spring expands and pulls back thepawl-carrier, and as its pawl is in engagement with the gear T thelatter will be turned back in the direction of arrow 30, Fig. 4. Thusletsback is imf parted to the take-up mechanism and it is ter minatedwhen the teeth @w enter between and are moved back against the leadingfaces of the teeth w on the disk Dw. Manifestly the fewer the teeth Zwthe greater will be the amount of let-back. On the next forward beat ofthe lay the pawl is disengaged from the gear T* and drops into normalposition in the guide 3 in readiness for the next operation of thetakeup-arresting means. It will be obvious that the backward rotation ofthe gear T* by the means described causes a retrograde movement of thedriven member E, so that any clogging or sticking of the parts isovercome and the let-back is effected independently of the pull of thecloth.

Referring to Fig. 5, a spring-plunger 9 is mounted in the guide to forma yielding seat for the pawl-carrier 4C, preventing breakage of theparts when the pawl is raised by or through the lifting of the link fwand guide 3 on the forward beat of the lay and permitting the pawl 5 toclick past the teeth on gear 'l"l to the IOO l'ZO

ISO

position shown in Fig. 4 in readiness to operate.

My invention is not restricted to the precise construction andarrangement shown and described herein, for the same may be modified orchanged in various particulars by those skilled in the art withoutdeparting' from the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

l. In a loom, a filling-detector, a controlling-shaft adapted to beoperated thereby upon detection of an abnormal condition of the filling,take-up mechanism, including a continuously-rotating driving member anda normally cooperating' driven member, means to discngag'e said membersupon the operation of the controlling-shaft, to arrest take-up, andmeans to automatically cause let-back when such disengagement iseffected.

2. In a loom, take-up mechanism, including a continuously-rotatingdriving member and a normally cooperating driven member, means to throwthe latter out of operation and to return it to operative position uponthe detection of an abnormal condition of the filling, to thereby arresttake-up, a filling-detectorto detect such condition, and means toautomatically cause a predetermined amount .of letback when the drivenmember is thrown out of operation.

3. In a loom, a controlling-shaft therefor adapted to be operated by orthrough detection of filling failure, a filling-detector, takeupmechanism, including a continuously-rotating' driving member and anormally coperating driven member, means to effect relative movement ofsaid members upon the operation of the controlling-shaft and therebyarrest take-up, and means to automatically cause let-back when suchrelative movement is effected.

4. In a loom, take-up mechanism, including a positively and continuouslyrotating driving member, and a driven member normally cooperatingtherewith, combined with a fillingdetector, means controlled bydetecting movement thereof to prevent cooperation of the driving' anddriven members, and means operative automatically at such time to causea predetermined amount of let-back.

In take-up mechanism for looms, in combination, a take-up roll, acontinuously-rotating driving member, connections, including a drivenmember, between said take-up roll and the driving member, means governedby the detection of an abnormal condition of the filling to disconnectthe driving and driven members, to arrest take-up, and means toautomatically cause reverse movement of said connections upon suchdisconnection, to thereby effect let-back.

' 6. In take-up mechanism forlooms, in combination, a take-up roll, acontinuously-rotatl ing driving member, connections, including a drivenmember, between said take-up roll and the driving member, means governedby the detection of an abnormal condition of the filling to disconnectthe driving and driven members. to arrest take-up, and means, includinga normally inoperative pawl, to automatically engage and cause reversemovement of said connections upon disconnection of the driving anddriven members, to thereby effect let-back.

7. In take-up mechanism for looms, a driving member having two opposedand connected disks provided on their inner faces with teeth, the numberof teeth on one member being greater than those on the other disk, and atoothed driven member laterally shiftable between the disks and normallyin engagement with the smaller number of teeth, combined with alling-detector, means to shift the driven member out of engagement withsaid teeth and into engagement with the teeth on the other disk, andthen to shift the driven member back again, whereby the driving membergains and take-up is arrested, and means to cause let-back on the returnshift of the driven member, the amount of let-back being determined bythe distance between the teeth in the series having the smaller number.

8. In a loom, alay, apawl-carrier mounted thereon and provided with apawl, a spring to. control movement of the pawl-carrier relatively tothe lay, take-up mechanism, including a driving member and a normallycoperating' driven member, and connections between the latter and thetake-up roll, a filling'- detector, means operated by or throughdetecting action thereon to throw the driven member out of operation andthereby arrest take-up, and means operated by detecting action of thefilling-detector to cause engagement of the pawl with a rotatable memberof the connections between the driving and driven members, to causeretrograde movement of said connections and thereby effect let-back.

9. vIn a loom provided with automatic fillingreplenishing mechanism, afilling-detector, a controlling-shaft for said mechanism adapted to beoperated by or through detecting action of the detector, take-upmechanism, including a take-up roll, and normally coperating driving anddriven members, means actuated by operation of the controlling-shaft todisengage said members, to arrest take-up upon filling replenishment,and means to automatical'ly cause retrograde rotation of said takeuproll and effect let-back upon such disengagement.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM S. SOUTHI/VICK.

Vitnesses:

GEORGE Oris DRAPER, ERNEST W. VVooD.

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